001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.binding;
016    
017    import org.apache.hivemind.Location;
018    import org.apache.hivemind.util.Defense;
019    import org.apache.tapestry.coerce.ValueConverter;
020    import org.apache.tapestry.services.InjectedValueProvider;
021    
022    /**
023     * A binding that accesses a HiveMind object. This is similar to injecting a HiveMind object as a
024     * property and referencing that property.
025     * 
026     * @author Howard M. Lewis Ship
027     * @since 4.0
028     */
029    public class HiveMindBinding extends AbstractBinding
030    {
031        private String _objectReference;
032    
033        private InjectedValueProvider _provider;
034    
035        public HiveMindBinding(String description, ValueConverter valueConverter, Location location,
036                String objectReference, InjectedValueProvider provider)
037        {
038            super(description, valueConverter, location);
039    
040            Defense.notNull(objectReference, "objectReference");
041            Defense.notNull(provider, "provider");
042    
043            _objectReference = objectReference;
044            _provider = provider;
045        }
046    
047        public Object getObject()
048        {
049            return _provider.obtainValue(_objectReference, getLocation());
050        }
051    
052    }